Carbon removing tool



. Jan. 11, 193.8.

M. HoLHuT 2,104,900

CARBON REMOVING TOOL Filed Sept. 16, 1936 TfoPA/E Y Patented Jan. 11,1938 'res Liverii1 FTENT OFFICE CARBON REMOVING TOOL Michael Holhut,Jennings, Mo., assigner to H & H Machine & Motor Parts Co., St. Louis,Mo., a corporation of Missouri Application September 16, 1936, SerialNo. 101,003

3 Claims.

This invention relates generally to tools for the removal ofincrustations from the interior of cylindrical ports, openings, tubes,and the like and, more particularly, toa certain new and usefulimprovement in tools especially, though not exclusively, adapted for theremoval of incrusted carbon from the cylinder ports. of internalcombustion engines.

-.My invention has for its primary object the provision of a tool of thetype and for the purposes stated, which is simple in structure, whichmay be inexpensively andv economically manua factured, which is durableand conveniently operable, and which is efficient in the performance ofits intended functions.

And with the above and other objects in View, my invention resides inthe novel features of form, construction, arrangement, and combinationof parts presently described and pointed out in the claims.

In the accompanying drawing,-

Figure 1 is an elevational View of a carbonremoving tool of myinvention, the tool being shown in operative or working position withina motorport and driven by a standard electric drill chuck;

Figure 2 is an enlarged side elevational view, partly in section, of thetool;

Figure 3 is an end elevational view of the tool;

Figure 4 is a perspective view of one form of cleaning burr forming partof the tool; and

Figure 5 is a perspective view of a modified form of cleaning burr alsoforming part of the tool.

f Referring now in more detail and by reference characters to thedrawing, the tool, as best seen in Figure 2, comprises a head-member ipreferably, thoughrnot necessarily, circular in contour, extendingoutwardly from a face of which is a preferably circular shank 2 adaptedto t in any suitable rotary actuating member, such, for instance, as anelectric drill 3.

Rigidly mounted at an end in, and extending axially outwardly from theother face of, the head I, is an annular series of spaced rods 4,preferably, though again not necessarily, four in number.

utilize a burr having a number of sharp corners, as at 1 and as bestseen in Figures 3 and 4, the burrs 6 being so shaped and having suchdia-- metrical size that the sharp corners 'l will extend slightlyradially outwardly beyond the cir- 5 cumferential limits of the head l,as best seen in Figure 3.

Also loosely mounted on, and freely rotatable about, the end of eachrespective rod 4, is an end-burr 8, which is preferably somewhat thicker10 ing the end-burr 8, the intermediate burrs 6, and 15 the sleeve 5 inloosely assembled substantially abutting or contiguous relationshipthereon.

It should be noted that the length of the sleeve 5 and the combinedthickness of the several burrs 6 and the end-burr 8 is such that, whenthe entire assembly is arranged on a particular rod 4, there will besome freedom to allow for a certain amount of longitudinal slippagealong the rod. It will be further noted that the respective rods 4 arefree at their forward ends, so 25 that they may move toward or away fromeach other radially for a purpose presently to be described.

It being understood that, as shown, the tool at its so-called burred endis of a size to freely 30 t for rotary operation within a cylinder-portl0, in use and operation, the shank 2 is inserted in the chuck of theelectric drill or other turning device 3, the burred or forward end ofthe tool then inserted partially into the motor-port or 35 opening l0 tobe cleaned, and the turning device 3 actuated to produce rapid rotationof the tool. As the tool rotates, the sharp corners l of the severalburrs 6, 8, will dislodge carbon or other such incrustations or the likepresent on the side 40 of the motor-port. Since the several rods 4 attheir respective end-portions are freeand may move radially within thelimits of axial flexibility of the rods, as the rotary speed of the toolincreases, centrifugal force will tend to move or 45 vibrate the severalrods 4 at their free forward end-portions radially outwardly, impartingslight outward curvature to the rods, thus enlarging the diametricalsize of the tool and bringing greater disruptive force to bear upon theincrustations encountered by the several burrs, removal of carbon orother incrustations being quickly and eiciently effected. Similarly, ifthe tool encounters an immovable projection in the motor-port, theresiliency and yieldability provided in the present tool will obviateserious damage to, or breaking of, the tool.

The tool may be constructed in various `sizes and may be designed for avariety of cleaning operations. Thus, for instance, in cleaning boilertubes, the tool may be provided with a flexible power transmittingextension formed on, or operably connected to, the shank 2, so that thetool may be connected to a somewhat remote source of rotary motion. Itwill also be apparent that, in extremely large tools, the expense ofwhich is comparatively great, it may be desirable to form the rods 4 insuch a manner that 'they may be removed from the head l, the rods 4being removably or replaceably Vsecured in the head l during operationby a set-screw or other suitable means, not shown. Thus, in the event ofthe breakage or dulling of any one or more of the burrs 6, 8, theparticular rod 4 on which such damaged burr may be mounted may beremoved and the particular burrs, or'the whole rod or burr assembly,replaced without the necessity of discarding the entire tool.

Preferably the burrs E, 8, have the form and contour best seen in Figure3. However, as stated, such burrs may partake of different forms, andmay be of hexagonal form, as 6a, in Figure 4, rectangular form, as at6b, in Figure 5, and the like, the burrs, in each instance, having aplurality of projecting lrelatively sharp corners l.

It will be understood that changes and modifications in the form,constuction, arrangement, and combination of the several parts ofthetool may be made and substituted for those herein shown and describedwithout departing from the nature and principle of my invention.

Having thus described my invention, what I claim and desire to secure byLetters Patent is,-

1. In a tool of the class described, a disk-shaped head-member, anannular series of spaced parallel iiexible rods each rigidly mounted atan end in the head-member, said rods being at their other endsunrestrained, a plurality of burrs disposed for rotation on therespective rods, and means for retaining the burrs loosely on therespective rods.

2. The herein described rotary tool for endWise insertion into therespective'cylinder ports of an internal combustion engine for theremoval of carbon, the same including a disk having a shank projectingfrom an end face thereof for engagement with a tool-actuating member, aplurality of metallic rods each rigidly seated at an endportion in theopposite end face of the disk, said rods extending outwardly from thedisk in a peripherally spaced annular series and being free anddisconnected one from the other at their outer ends for independentoutward flexure under the influence of centrifugal force on rotation ofthe tool, and a series of burrs disposed along the respective rods forindependent rotation.

3. In a tool of the class described, a `neadmember, an annular series ofspaced parallel flexible rods each mounted at an end in the headmember,said rods being at their other ends unrestrained, a plurality of burrsdisposed for rotation on each of the respective rods, a rotatable osleeve looselyvmounted on each of the rods be'- tween the head-memberand the burrs, and means for retaining the burrs and the sleeves looselyon the respective rods.

MICHAEL HOLH'UT.

